Products
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Raw Materials
Processes
- Binding
- Collating
- Corner cutting
- Creasing
- Cutting
- Cutting to size
- Die-cutting
- Edge painting
- Flocking
- Foil stamping
- Folding
- Gluing
- Grommeting
- Hole drilling
- Hole punching
- Hot Stamping
- Laminating
- Numbering
- Padding
- Perfect binding
- Perforating
- Round cornering
- Saddle stitching
- Sealing
- Spiral binding
- Stapling
- Tabbing
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Operations
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- Blistering or cockling
- Blowing in dryers
- Breaks, dryer section
- Build-up on dryers
- Curl in paper
- Cutting in dryers
- Dimensional stability
- Dryer area defects
- Dryer felts
- Dryer temperature control
- Dryer wraps
- Drying uniformity
- Evaporation rate, maintaining
- Felt tension control
- Hot dryer bearings
- Moisture streaks in dryers
- Over-drying
- Shrinkage control
- Uneven drying
- Air in the system
- Blotches in the sheet
- Breaks, wet end
- Crush
- Dirt in the sheet
- Drainage varying
- Grainy edges, reduction
- Holes in the sheet
- Pinholes, reducing
- Sheet sealing
- Stock jumping
- Stock skating on wire
- Stock sticking to wire
- Strings, elimination
- Watermarking with ring
- Wet/dry line moving
- Wire marks
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- Breaks, press section
- Bulk improvement
- Crushing, press
- Leaking doctor blades
- Moisture profile
- Peeling, press rolls
- Pickup problems
- Pitch on doctor blades
- Press cuts/wrinkles
- Press picks
- Rewet problems
- Shadow marking
- Sheet blowing, press nips
- Sheet crushing
- Sheet following top press rolls
- Sheet stealing
- Vibration at press
- Water removal (CD)
- Water removal, wet press
- Wrinkles, press section
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- Annular rings
- Baggy rolls
- Bursting or cracked rolls
- Cleaner slitting
- Corrugations
- Corrugations, winders
- Defective splices
- Dust in rolls
- Dust in the rolls
- Good roll condition, off winder
- Hard and soft spots/ridges
- Interweaving
- Loose cores
- Loose paper, in roll
- Nicked edges
- Out-of-round rolls
- Reel or roll quality
- Rewound roll quality
- Run-in of slit rolls
- Shipping roll characteristics
- Snap-offs
- Soft edges
- Starred rolls
- Telescoping
- Turned edges
- Variable density rolls
- Winder cracks
- Winding requirements
- Wrinkles, winder
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Careers
Pulp & Paper Manufacturing
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Companies
Good roll condition, off winder
1. A good parent reel is needed.
2. By a combination of correct tension put in by the drums, effective braking of the parent reel, and correct rider roll pressure (programmed), the tension in the reel should drop steadily in moving from the core to the periphery.
3. If the winder does not have automatic tension control and regenerative braking, it is necessary to speed up gradually and slow down steadily in order to maintain constant tension.
4. Check the tightness of the wound rolls.
5. For any rolls with defects, they should be rewound as soon as possible or the defect may become set and impossible to remove later.
6. Sometimes, defective rolls are rewound and appear to be acceptable and of even hardness;
however, the defect may not really be removed so it shows up at the converter as soon as tension on the roll is released.
Note: Ensure that all rolls sent to the rewinder have full information concerning the location and amount of defective paper. A void detector prior to the machine reel helps provide the information.